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2 results on '"Barry Woodfine"'

1. The effect of phosphate, fluorine, and soda content of the glass on the mechanical properties of the glass ionomer (polyalkenoate) cements

Author

Robert G. Hill, Robert V. Law, Barry Woodfine, Natalia Karpukhina, Hiroko Kusumoto, and Sobhan Abolghasemi

Subjects
Materials science, Polyalkenoate Cements, Glass ionomer cement, chemistry.chemical_element, 030206 dentistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Phosphate, Electronic, Optical and Magnetic Materials, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, chemistry, Fluoride release, Dental cement, Materials Chemistry, Ceramics and Composites, Fluorine, Composite material, 0210 nano-technology
Abstract

The authors would like to thank the Department of Trade and Industry, UK, under the project number of TP/5/REG/6/I/H0669A.

Published
2016
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2. Polyetherimides—synthesis and structure-property relationships

Author

John N. Hay, Martin Davies, and Barry Woodfine

Subjects
chemistry.chemical_classification, Materials science, Polymers and Plastics, Organic Chemistry, Structure property, Rotational freedom, 02 engineering and technology, Polymer, 021001 nanoscience & nanotechnology, 020401 chemical engineering, chemistry, Computational chemistry, Polymer chemistry, Materials Chemistry, 0204 chemical engineering, 0210 nano-technology, Glass transition
Abstract

Polyetherimides have been synthesized by two complementary routes starting from 4-halophthalic anhydride. A range of polymers has been prepared by varying the structure of the diamines and bisphenols employed in the syntheses. These polymers have been characterized by their m spectra, molecular weight and thermal properties. The applicability and limitations of the synthetic routes are discussed. Structure-property (glass transition temperature, Tg relationships are elucidated and discused in terms of the structural fragments in the polymer chain. Chain flexibility, rotational freedom and inter-chain interactions are all important parameters affecting the polymer properties. The effect of polymer molecular weight on Tg is also discussed.

Published
1993
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